body{
	background-color:whitesmoke;
	margin: 0 auto;
}
a{
	text-decoration: none;
}
#catalog{
	width: 1000px;
	height: 1550px;
	margin: 0 auto;
	font-family: 楷体;
}
#catalog_header{
	width: 980px;
	height: 100px;
	padding: 10px;
	text-align: center;
	margin: 0 auto;
	background-color: white;
	font-size: 25px;
}
#catalog_nav{
	width: 100%;
	height: 30px;
	text-align: left;
}
#catalog_nav a{
	color: black;
}
#catalog_nav a:hover{
	color: blue;
}
#catalog_search{
	padding: 10px;
}
#catalog_search input{
	float: left;
	font-size: 25px;
	width:300px;
	padding: 5px;
	border-radius: 10px;
	border:solid 1px black;
	font-family: 宋体;
}
#catalog_search button{
	font-size: 25px;
	padding: 5px;
	border-radius: 10px;
	background-color: lightgray;
	color: black;
	margin:0 10px 0 10px;
	font-family: 宋体;
}
#catalog_search select{
	float: left;
	font-size: 25px;
	height: 40px;
	border-radius: 10px;
	font-family: 宋体;
	margin-left: 5px;
}
#catalog_search button:hover{
	color: white;
	background-color: deepskyblue;
}

#content{
	width: 1000px;
	height: 1500px;
	padding: 0px;
	margin-top: 10px;
	line-height: 50px;
}
#catalog_left{
	width: 300px;
	height: 1450px;
	float: left;
	margin: 0px;
	background: white;
}
#classfiy{
	height: 50px;
	padding: 20px;
	text-align: center;
	background-color:steelblue;
	color: white;
	font-size: 40px;
	font-family: "微软雅黑";
	font-weight: bold;
}
#catalog_left ul{
	margin: 10px 0 0 40px;
	padding: 5px;
	list-style-type: square;
	color: darkblue;
	font-size: 30px;

}
#catalog_left li a{
	color: #000000;
}
#catalog_left li a:hover{
	color: blue;
}
#catalog_right{
	width: 650px;
	height: 1450px;
	float: right;
	margin: 0px;
	background-color: white;
}
#catalog_right table{
	text-align: center;
	padding: 5px;
	font-size: 20px;
	color: gray;
	margin: 0 auto;
}
#catalog_right table img{
	width: 160px;
	height: 250px;
	margin: 10px;
}

#footer a{
	color: white;
	background-color: blue;
	font-weight: bold;
	border-radius: 15px;
	padding: 10px;
}
#footer a:hover{
	background-color: lightskyblue;
	color: white;
}
#footer button{
	color: white;
	background-color: blue;
	font-weight: bold;
	border-radius: 15px;
	padding: 10px;
}
#footer button:hover{
	background-color: lightskyblue;
	color: white;
}

